/**
 * @author ZhengDp
 * @Date 2023/4/2 17:08
 */
public class ListNode {
    int val;
    ListNode next;

    ListNode(){}

    ListNode(int x , ListNode next) {
        this.val = x;
        this.next = next;
    }
    ListNode(int x) {
          val = x;
          next = null;
      }
}
